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I'm not a MySQL expert (although I'd like to be - not enough hours in the day), but you might need to quantify your request at least a little. Databases have different field types for different types of data, but all of them have a limit to the size of the data they are capable of holding. Think of it this way: in order to have a field with no limit it to its size, you would have to have a storage space (theoretically) of infinite size.